One-dimensional CuO–SnO2 p–n heterojunctions for enhanced detection of H2S
| Autor: | Joan Ramon Morante, Irina Giebelhaus, Marina Rumyantseva, Vladimir Ivanov, Jordi Arbiol, Wieland Tyrra, Sanjay Mathur, Thomas Fischer, Elena Varechkina, Alexander Gaskov |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Nanowire chemistry.chemical_element Conductance Heterojunction Nanotechnology 02 engineering and technology General Chemistry Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper 0104 chemical sciences Highly sensitive Crystallography chemistry Depletion region General Materials Science 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A. 1:11261 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c3ta11867c |
| Popis: | Highly crystalline SnO2 nanowires were synthesized and functionalized with copper particles in a CVD using Sn(OBut)4 and [CuII((C5H4N)(CHCOCF3))2]2 (1) as precursors respectively. Controlled oxidation of Cu to CuO led to the formation of CuO@SnO2 p–n heterojunctions, which were found to be highly sensitive and selective towards the detection of H2S gas. The change in the conductance upon exposure to H2S gas was attributed to the formation of CuS resulting in the shrinkage of the space charge region along the SnO2 nanowire and a concomitant increase of the conductivity channel in an individual nanowire. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|